Remove parts of //cc we aren't using

cc/layers/picture_image_layer_impl.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "cc/layers/picture_image_layer_impl.h"
-
-#include <algorithm>
-
-#include "cc/debug/debug_colors.h"
-#include "cc/trees/layer_tree_impl.h"
-
-namespace cc {
-
-PictureImageLayerImpl::PictureImageLayerImpl(LayerTreeImpl* tree_impl,
-                                             int id,
-                                             bool is_mask)
-    : PictureLayerImpl(tree_impl,
-                       id,
-                       is_mask,
-                       new LayerImpl::SyncedScrollOffset) {
-}
-
-PictureImageLayerImpl::~PictureImageLayerImpl() {
-}
-
-const char* PictureImageLayerImpl::LayerTypeAsString() const {
-  return "cc::PictureImageLayerImpl";
-}
-
-scoped_ptr<LayerImpl> PictureImageLayerImpl::CreateLayerImpl(
-    LayerTreeImpl* tree_impl) {
-  return PictureImageLayerImpl::Create(tree_impl, id(), is_mask_);
-}
-
-void PictureImageLayerImpl::GetDebugBorderProperties(
-    SkColor* color, float* width) const {
-  *color = DebugColors::ImageLayerBorderColor();
-  *width = DebugColors::ImageLayerBorderWidth(layer_tree_impl());
-}
-
-bool PictureImageLayerImpl::ShouldAdjustRasterScale() const {
-  return false;
-}
-
-void PictureImageLayerImpl::RecalculateRasterScales() {
-  // Don't scale images during rastering to ensure image quality, save memory
-  // and avoid frequent re-rastering on change of scale.
-  raster_page_scale_ = 1.f;
-  raster_device_scale_ = 1.f;
-  raster_source_scale_ = std::max(1.f, MinimumContentsScale());
-  raster_contents_scale_ = raster_source_scale_;
-  // We don't need low res tiles.
-  low_res_raster_contents_scale_ = raster_contents_scale_;
-}
-
-void PictureImageLayerImpl::UpdateIdealScales() {
-  ideal_contents_scale_ = 1.f;
-  ideal_page_scale_ = 1.f;
-  ideal_device_scale_ = 1.f;
-  ideal_source_scale_ = 1.f;
-}
-
-}  // namespace cc